ResumoO objetivo do trabalho foi avaliar a qualidade das águas do igarapé Bonzinho da cidade de Ji-Paraná -RO. Após estabelecidos 02 pontos de amostragemno igarapé. Foram analisadas as seguintes variáveis de qualidade: coliformes fecais, demanda bioquímica de oxigênio -DBO, fosfatos, nitratos, oxigênio dissolvido -OD, pH, sólidos totais, temperatura e turbidez. Os resultados foram analisados frente aos padrões de qualidade para Classe 2 e agrupados para o cálculo do Índice de Qualidade da Água (IQA). A maioria das variáveis atenderam aos requisitos de qualidade para a Classe 2 e o IQA foi interpretado como "Regular".Palavras-chave: Recursos hídricos. IQA. bacia Amazônica. AbstractThe objective of this study was to evaluate the water quality of Rio Bonzinho in the city of Ji-Paraná, RO. We established 02 sampling points in the river. We analyzed the following variables of quality: fecal coliform, biochemical oxygen demand, phosphates, nitrates, dissolved oxygen, pH, total solids, temperature and turbidity. Results were analyzed against quality standards for Class 2 and grouped to calculate the Water Quality Index (WQI). Most variables met the quality requirements for Class 2 and WQI was interpreted as "Regular".
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